<template>
  <div class="login_container">
    <div class="login_box">
<!--      头像区域-->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" >
      </div>
<!--      登录表单区域-->
      <el-form label-width="0px" class="login_form"
               :model="loginForm"
               :rules="loginFormRules"
               ref="loginFromRef">
<!--        用户名,v-model通常用于input的双向数据绑定-->
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-user" v-model="loginForm.username" placeholder="请输入账号"></el-input>
        </el-form-item>
<!--        密码,v-model通常用于input的双向数据绑定-->
        <el-form-item prop="password">
          <el-input prefix-icon="el-icon-lock" v-model="loginForm.password"
                    placeholder="请输入密码"
                    show-password @keyup.enter.native="login"></el-input>
        </el-form-item>
        <!--        按钮-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login" >登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
        </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: "Login",
  methods:{
    //点击重置按钮，重置登录表单
    resetLoginForm(){
      this.$refs.loginFromRef.resetFields()
    },
    login(){
      //validate的参数是个回调函数，参数是 是否校验成功和未通过校验的字段
      this.$refs.loginFromRef.validate((valid)=>{
        if(!valid) return;
        //通过{}解构出一个data属性然后重命名为res，这就是真实的服务器数据
        this.$http.post('login',this.loginForm).then(({data:res})=>{
          if(res.meta.status!==200) return this.$message.error('登录失败')
          this.$message.success('登录成功')
          window.sessionStorage.setItem('token',res.data.token)
          this.$router.push('/home')
        });

      })
    }
  },
  data(){
    return{
      //登录表单的数据绑定对象
      loginForm:{
        username:'admin',
        password:'123456'
      },
      //表单验证规则对象
      loginFormRules:{
        //验证用户名是否合法
        username: [
          { required: true, message: '请输入登录用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        //验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ],
      }
    }
  }
}
</script>

<style scoped>
  .login_container{
    background-color: #2b4b6b;
    height: 100%;
  }
  .login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
  }
  .avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
  }
  .avatar_box img{
    height: 100%;
    width: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
  .btns{
    display: flex;
    justify-content: flex-end;
  }
  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 10px ;
    box-sizing: border-box;
  }
</style>
